ALFAT-OM-337 GHI Electronics, ALFAT-OM-337 Datasheet - Page 31

• Manufacturer Part Number: ALFAT-OM-337
• Description: Memory IC Development Tools ALFAT USB / SD to UART / SPI OEM BOARD
• Manufacturer: GHI Electronics

Specifications of ALFAT-OM-337

• Rohs: yes
• Product: SD OEM Board
• Tool Is For Evaluation Of: SD, SDHC, MMC Cards, USB drives
• Memory Type: Flash
• Operating Supply Voltage: 3.3 V
• Description/function: OEM board offers a seamless way to access files on SD & MMC cards and on USB memory drives
• Interface Type: I2C, SPI, UART, USB
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Part # Aliases: GHI-ALFAT-OM-337

GHI Electronics
Rev. 1.13
F - Flush File Data
C - Close File
P - File Seek
This command flushes (commits) the data of an opened file. The file will still be opened
and associated with a handle, after calling the command. This command is useful to
make sure all data are physically saved in the media.
To make sure that the data is written to a file, the file must be flushed (F command) or
closed (C command) when done, or there will be a risk of losing data or corrupting the
file system if the storage media was removed or if there was a power loss.
This command issues a flush file (F – Command) internally and then release the file
handle.
This command changes the current byte position in a file. Valid values are ranging from
0 to file size.
Format
Example F
Format
Example C
Format
Example P
F
!00
!00
C
!00
!00
P
!00<LF>
!00
<SP>
<SP>
<SP>
<SP>
<SP>
<SP>
<LF>
<LF>
<LF>
<LF>
<LF>
n
0
n>ssssssss
1>10
n
0
<LF>
<LF>
<LF>
<LF>
<LF>
<LF>
Page 31 of 51
n File Handle 0 through F
ssssssss 4 bytes new position
Set file pointer at index 0x10 (16 in decimal)
Flush File handle n
n can be 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E or F
Flush File handle 0
Close File handle n
n can be 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E or F
Close File handle 0
ALFAT SoC Processor
ALFAT Command Set
www.ghielectronics.com